From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph comparing power output (BHP) and BMEP for different cylinder head configurations against engine RPM.
| Identifier | ExFiles\Box 134\2\ scan0140 | |
| Date | 20th August 1937 | |
| HIGH POWER HEAD FIG V POWER ON INCLINED VALVE HEAD B.M.E.P. MAIN ENGINE B.H.P R.P.M. 1 STANDARD BENTLEY (3 1/2 LITRE) C.R = 6.4 VALVE TIMING :- I.O. 4°E; I.C. 51°L; E.O 51°E; E.C. 7°L; 2 INCLINED VALVE HEAD AND DRY LINER BLOCK C.R = 6.3 VALVE TIMING :- I.O. T.D.C; I.C. 28°L; E.O. 35°E; E.C. T.D.C; EXHAUST VALVE = 1.500" DIA. 3 AS 2 BUT WITH CAST - IRON BLOCK AND 1.600" DIA EXHAUST VALVE. E.D 20.8.37 | ||